Massachusetts. Board of Education, Horace Mann (1849). “The Massachusetts System of Common Schools: Being an Enlarged and Rev. Ed of the Tenth Annual Report of the First Secretary of the Massachusetts Board of Education”, p.80
Letter to her daughter Mary, Countess of Bute, 30 May 1756, in Robert Halsband (ed.) 'The Complete Letters of Lady Mary Wortley Montagu' vol. 3 (1967) p. 107